Challenging series Synonyms

Definitions for Challenging


  • (adjective) requiring considerable physical or mental effort
  • (adjective) requiring much time, effort, or careful attention
  • (adjective) requiring full use of your abilities or resources

Definitions for Series


  • (noun) similar things placed in order or happening one after another
  • (noun) a group of postage stamps having a common theme or a group of coins or currency selected as a group for study or collection
  • (noun) (mathematics) the sum of a finite or infinite sequence of expressions